Biliary Papillomatosis...projecting from bile duct

Contrary to well-documented flat type neoplasms, biliary

papillomatosis or intraductal papillary mucinous neoplasmbilliary

type (IPMN-B) is relatively rare and a recently diagnosed

disease entity. Papillary neoplasm of the bile ducts are

rare, pathology is characterized by diffuse papillary proliferation

of the bile duct epithelial cells. They account for 3-5%

of cholangiocarcinomas and can arise from any portion of

the intra or extra hepatic bile ducts. Biliary intraductal

neoplasms are proposed to be of two types: flat and papillary. Papillary cholangiocarcinoma is believed to have a better

clinical course than non-papillary cholangiocarcinoma, just

as malignant intraductal papillary mucinous neoplasm of the

pancreas (IPMN-P) has a better prognosis than pancreatic

ductal adenocarcinoma.